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Eagle Populations Crashed Because Their Eggshells Were So Thin That

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Eagle populations crashed because their eggshells were so thin that the fetuses were not able to survive,a result of DDT toxicity.Low levels of DDT were measured in nearby waterways,yet the fish living there appeared unaffected.Explain how the low levels of DDT in the water had no obvious effect on the fish populations but wreaked havoc on eagles,the top predators.

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Although DDT starts out in very small co...

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